| A study on models of forecasting soil moisture and warning drought in Gansu loess plateau |
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| DOI：10.7606/j.issn.1000-7601.2010.03.46 |
| Key Words: soil moisture drought forecasting model loess plateau |
| Author Name | Affiliation | | PU Jinyong | The Agrometeorlogical Experiment Station of Tianshui, Tianshui, Gansu 741020, China | | YAO Xiaohong | The Agrometeorlogical Experiment Station of Tianshui, Tianshui, Gansu 741020, China | | XIN Changye | The Agrometeorlogical Experiment Station of Tianshui, Tianshui, Gansu 741020, China | | LIU Xiaoqiang | Tianshui Meteorological Beurea, Tianshui, Gansu 741000, China |
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| Abstract: |
| We made an experiment of soil water consuming at the Agrometeorological Experiment Station of Tianshui
in 2006. Based on the test data, the characteristics of soil moisture depletion under natural condition was studied. The results showed that the soil moisture depletion tumed out a logarithmic curve with time beginning from the most suitable point. The duration of soil moisture decreasing from the highest limit of optimum to the lowest limit was 5 days, with a speed of 13.4 mm a day. From light drought to serious drought it needed 20 days, and the ratio of soil water consuming was 3.9 mm a day. Based on these results, we established the models to forecast soil moisture and wam drought. The models showed high accuracy by testing with measured values, and they had a certain degree of practicality. |
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